Contains both The Reindeer People and Wolf's Brother
From the cover flap:
His father dead, young Kerlew and his mother, Tillu the healer, survive by moving from tribe to tribe. Magical promise shines within Kerlew, and the shaman Carp, recognizing the boy's gift, tries to claim both mother and son for his own. But Tillu wants no part of him; she takes her son and flees, until she and Kerlew meet the nomadic reindeer people who follow the vast herds. Welcomed by the tribe, they are all too soon caught up in a dangerous struggle between the hunter/herder Heckram, who helps Kerlew search for his true spirit friend, and the dangerously ambitious Joboam. Then Carp, too, finds the reindeer people and begins a cunning campaign to become their shaman, and to lure both Kerlew and Tillu back into his power. But Kerlew has felt the call of the Wolf spirit and now must seek the true path in a conflict between his totem and that of Carp's spirit of the Bear.